Excavator dipper construction



Sept. 23, 1947.

w. s. BURDICK ETAL EXCAVATOR DIPPER CONSTRUCTION Filed Aug. 27, 1945 5Sheets-Sheet l INVENTQRS Sept. 23, 1947. w. s. BURDICK EI'AL EXCAVATORDIPPER CONSTRUCTION s Sheeis-Sheet 2 Filed Aug. 27, 1945 INVENTORS 4444f 3 4 y [041.

Sept. 23, 1947. w. s. BURDICK ETAL EXCAVATOR DIPPER CONSTRUCTION sshets-sneet .3

Filed Aug. 27, 1945 INVENTORS m f MM Patented Sept. 23, 1947Corporation, Milwaukee, Wis .,a I orp Wisconsin nioAvAroItnIPPERconsistence I amn s ai: Battier, dale, W ,.,.jassigno rs to fHar sehfegri l eavemiqnjrela es tqs xeerei. d fi a- The enera a je t invent .n of wd a d nner f the 'iabr etedi pe o m d of plates. nd e mi lsw de t e endt man anese street-; a lg ti9 l b a i vd hinge lugs to provide a strongbut relatively'li ght WQ h R yvisedans-shel ;:iq sm e ii n b n, h mananese fr t th lba l c st n rl Manda qe er lp aie r miner. si e box nsprovide a very strong connection between these I stress in the welded;joint, ,a e r tattms Si m w re wel es ind idi fi l t ai ntwhen 9. 2 sqiiihe .ie ntie i e, bv

p e lli v e sa-bee a a e weigh i beet e lsl. b9 hx d5 .v r l r'ae alcomers at the dipper back, these'corriers preferably taperda 21 il eieie ih l pit m. i t i p r so ft -the 1%.?5?!;;.?Omer; portionsare at thetop .mj iii a e jt a ed 9 1 ea e bi h els' at andme s rews eith r 7 ,e.rzla eet m he v rtic t l 1oz; sections at the corner portions "of thedipper obj t of the invention is to P TQVide M i ssrs iih term-abet e tja st th corner te ti a iiee di be si ee at the t an Jib .p rii sqf. 19.d p o or qn l ns at the sides'and back of the dipper so as to obtain anexterior framework around the dipper to reinforce the same and secure amore satisfactory distribution of severe digging loads.

A further object Z'oithe invention is to provide, a dipper havingvertical box sections provid- "ed with horizontal diaphrag s atfsuchlevels as to make the horizontal sides" 'of'all box sections around theentire dipper atboth topand bottom eei e liavine re s l t tsrl 1;....dvzw ded. tethes cles p tth d nn r or ext strength in the tie betweensaid front and dipper body.

The invention further consists in the several features hereinafter setforth and more particuthereot continuous. I Wi pbieci iheinvenfi mpr via T M Q n13 5 .plates 2 9,whoseib 45 1 l lifls U V.

tom cover plates 3| and 32s. :Thefront ends of the side plates 29 are l'2 a lar lyr defined y ciaiiiis'attiie conclusion e'df."Intuit-drawings: 1 V Fi .1 is "a conventional vie jdffa"dipperofjtheshovel typeshowin'g'its'coiinectioris withthe dipper stick andboom; 3 v

X ii f bodying the inve'rition, arts being broken and: parts being.shown in's'btionl Fig. 3 "is "a back elevation view brine-hitting; Fig.4 is a detailed horizontal sectional View taken on the 'linef ll'oi Fig.2;

Fig. 5 is a deemed-much sectional viwtalien on the line 5-5 ofFigQ3; t QJ H in Fig. 6 is a; detailed'verticalseotion'alviewtaken on the'brokenlinetfi bffFi g ."2 I I i Fig. 7 is a detaild vertical sfiofialviwtflihontheline'l-J bf FigjZ; I I I Fig. 8 'is 'adet ail'ed verticals'eotional'viewtak'n on the line 8-'8 ofFig.4;, V pm Fig. 9 is adetailed nbrizbntn-"seeucnm view takenon the linei9-9 o f Fig.2; ig. 10is a detailed vertical sectionalviw taken on the line llJ- -l 0 of Fig;2.

Referring to the drawin slithenfifrferal Tidesignates the dipper front,13 the sides, l4gtheback, I5 the hoist rope bail castings, 1'6gthefstick pin connection, I! the doorhinges, and IS the dipper bracelink connectors. H

The dipper rq'nt cas fij m jaienee 'e ganese steel casting having sideportionsfl'il with projecting portions 20 and 2| l at the 9 ahdl attomthereof andthe usual replaceable teeth 22 suitably securedthereto and adoor latch keeper 23 riveted 1 mm- 4 1 r Each bail casting [5 has a,base portion ZQlwhich extends. almost the length of the side of thedippe and s r d t tsp ea end-' a iseentral portion and atits front end2'1 flhefront end of nes/tast n s ream ieimfe S-shaped joint 28 with themating end portion 20 of the front IZ an d is welded theretoalong thisjoint I ackpo ons are bent tolform vertical channel sections;3J0, andand hot- I elded to the sidesjofi the dipper front l2 as are also thefront ends oi the coverplates 3! and 32 see- Fig, 4. The base portion 24ofeaoh bail' casting i5'is "welded'at its e e portion Zlfl mi l-i sp pr:ed s 1 9 Fig. '7, to its side p1a te"29. The top cover plate 3| isalso welded along its bottom edge to the base portion 24 and at its backedge 33 is welded to the web of the channel section 30, see 'Fig. 4.

Each bottom side cover plate 32 is of channel section as shown in Fig.10 and is welded at its side edges 34 to its side plate 29.

The projecting portion 2| of the front is a V- or U-shaped form and iswelded as shown in Fig. 10 at 35 to the side plate 29 and is welded tothe front end 36 of the bottom side cover plate 32.

The back I4 includes a fabricated steel plate 31 having forwardly bentcorner portions 38 which are welded at their front edges to the sideplates '29 as shown at 39 in Fig. 4 and which are welded to the rearedges 40 of the back portions of channel sections 30 to form verticallydisposed box sections 4|. Diaphragms or brace plates 42 are welded tothe sides of each box section in planes alined with the tops and bottomsof the side box sections 43 and 44 formed by the side plates and theircover plates as heretofore described, and are shown in Fig. 8.

The back also includes top and bottom horizontally disposed steelchannel sections 45 and 46 whose edges are welded to the back of theback plate 31 as shown in Fig. to provide horizontal box sections 41 and48 which are alined respectively with the side box sections 43 and 44,so that box sections extend continuously around the sides'and back ofthe dipper, the ends of the channel sections 45 and '46 being welded tothe webs of vertical box sections 4| as shown at 49 in Fig. 4.

The dipper stick pin'mountings I6 are steel blocks or casting welded inspaced pairs to the box section 45, see Figs. 3 and'5.

The door hinge lugs I1 are steel blocks or castings welded in spacedpairs to the box section 46, and the inner .onesof these pairs of blocksalso form one of the dipperbrace link connectors l8 as shown in Figs. 3and 5. Theothers of the link connectors 18 are short steel blocks weldedto the box section 46 as shown in Fig. 3.

stiffening plates or ribs 50 are welded to the back plate 31 and toinner pivots IB- and the inner sets of hinge lugs I! as shown in Figs. 8and 5 and similar plates 5| are welded to said back plate, the innerblocks l8, and the box section 45 as shown in Fig. 3. A dipper door 52of any suitable construction may be mounted on the hinge lugs I! and beprovided with the usual operator controlled latch to engage in thekeeper or latch plate 23.

As' shown in Fig. 1, the bail 53 for the hoist rope 54 is pivotallyconnected to the bail castlugs 15, the dipper stick 55 is connected tothe pin mountings l6, and brace links 56 are operatively connected tothe connectors I8 and the dipper stick.

We desire it to be understood that this invention is not to be limitedto any particular form or arrangement of parts except in so far as suchlimitations are included in the claims.

What'we claim as our invention is:

1. In a dipper, the combination of a dipper front casting, bail castingshaving base portions having an S-shaped line butt welded connection withsaid front casting, and side plates also butt welded to said castingsalong said S-line and to said base portion lengthwise thereof.

2. In a dipper, the combination of a dipper front casting, bail castingshaving base portions with an S-shaped line butt welded connection withsaid front casting, side plates also butt welded to said castings alongsaid s-line and to said base portion lengthwise thereof, and coverplates for said bail castings welded thereto lengthwise thereof and buttwelded to said front casting along said S-line.

3. In a dipper, the combination of a dipper front casting, and bailcastings, side plates and cover plates for said bail castingscooperating therewith and with said side platesto form upper side boxsections, all of the parts forming said box sections being individuallywelded to said front casting at their adjoining edges.

4. In a dipper, the combination of a back plate having forwardlyinclined side margins, and side plates having their rear portions formedto provide channel sections, said channel having welded connection withsaid side margins to form vertically disposed box sections at thecorners of the dipper.

5. A dipper having sides and a back formed of metal plates weldedtogether to provide vertical box sections at the corners and horizontalupper and lower box sections at the sides and back of the dipper weldedto said vertical box sections.

6. A dipper having sides and a back formed of metal plates weldedtogether to provide'vertical boxsections at the corners and horizontalupper and lower box sections at the sidesand'back of the dipper weldedto said vertical box sections, said vertical box sections havinghorizontally-disposed plates welded thereto in planes coincident withthe tops and bottoms of said horizontal box sections to make continuousbox sections around the entire body of the dipper.

'7. In a dipper,- the combination of a dipper front casting havingprojecting pronged'portions at its lower end; side plates welded to saidpronged portions, and cover plates forthe lower portions of said sideplates welded theret and to said front casting and enclosing saidpronged portions. v

8.'In a dipper, the combination of a dipper front casting having sideprojections atits top and bottom portions, side plates having a weldedjoint connection with said projections, and cover plates cooperatingwith said side plates Y to form horizontal box sectionsat the upper andlower portions of the sides of the dipper having welded joint connectionwith said projections bail castingshaving welded joint connections withsaid front casting, said side plates, and the cover plates at the upperportions of the side plates.

9. In a dipper, the combination ofa-dipper front casting, sideplateshavingwelddconnection with said casting, bail castings havingbaseportions substantially coextensive with said side plates and havingwelding connections therewith and with said front casting, parts'ofs'aid welding connections being formed between apertured portions ofsaid bail castings and said side plates.

W. s. BURDICK. KARL SCHNEIDER. REFERENCES .oI'rED The followingreferences are of record in the file of this patent: j v

UNITED 'STATESPATENTS.

Number I Name {Date 2,185,176 Eager et al; Jani'2, 1940 2,243,965 LarsenJune'3,1941

2,336,729 Harris'et a1. Dec. 14,1943

